Seiko 5 50th Anniversary Sports Automatic SRP413K1 SRP413K SRP413 Men's WatchThe distinctive red 5 on the seconds hand immediately announces the presence of the 50th year Seiko 5 Sports; equally unique is the day/date window. These are the styles you will find on some older Seiko watches - also the curved glass and the Seiko 5 logo on the crown. The crystal is slightly curved and the see-through caseback gives quite a show. Expensive features – now a standard among the Seiko 5 Sports.